Floor-scraper.



LEWIS '.P. THOMPSON, OF MINNEAPOLIS, MINNESOTA.

ELooE-scRAPER.

Specification of Letters Patent.

Patented oet. 2,1917.

Application filed August 17, 1914. Serial No. 857,155.`

vide van improved floor-scraper, for use inl finishing hardwood ioors; and, to this end, it consists of the novel devices andl combinations of' devices hereinafter described and defined in the claims. y

In the accompanying drawings, which illustrate the invention, like characters indicate vlike parts throughout the several views.`

Referring to the drawings y* Figure 1 isa side elevation of the ini-v proved floor-scraper adjusted "to be pulled over the work;

lFig. 2 is a plan view of the improved Hoor-scraper adjusted to be pushed over the work;

Fig. 3 is a view partly in side elevation and partly in vertical section, taken on the line :r3 w3 of Fig. 2; and

Fig. 4L is a transverse vertical section, taken on the line m4 m4 of Fig. 1.

The numeral 1 indicates a main truck frame having integrally formed therewith a pair of laterally spaced, upwardly projecting side flanges 2. A pair of axially alined trunnions 3 is secured to the side iianges 2. Journaled on these trunnions 3 is a pair of truck wheels 4 equipped with 'rubber tires 5. Each side flange 2 has an upwardly and forwardly projecting extension 6 and an upwardly and rearwardly projecting extension 7.

The improved floor-scraper is either pushed or pulled over the floor by a handpiece-equipped handle-bar 8 pivotally connected to the extensions 6 by a fork 9, for vertical swinging movement. The inner end of the bar 8 is telescoped into a sleeve 10 formed onthe fork 9, and is secured thereto in different longitudinal adjustments by a set screw 11. As Abest yshown in Fig. 2, the prongs of the fork 9 embrace the extensions 6, and are pivotally secured theretofby nut-equipped bolts 12. The handlebar 8 is supported in an intermediate position by pairs of opposing coiled springs 13 tel-escoped on upright rods 14 anchored, at their lower ends, in the extensions 7. These springs 13 are compressed between pairs of nuts 15 and perforated ears 16 secured to the prongs of the forli 9. The rods 1-1 work longitudinally through the perforations in the ears 16.

Detachably and reversibly mounted on the main truck frame 1. between the sidel flanges thereof, is a supplemental'frame 17 having integrally formed therewith a pair of heavy upwardly projecting` flanges 18. These flanges 1S are provided to give the necessary weight to the truck to hold the scraper-blade to its work. rlhe supplemental frame 17 is also provided with a downwardly and outwardly projecting flange 19, which extends transversely of thev truck and affords a support for a scraper-blade clamp.

This clamp comprises a pair of opposing jaws 20, the inner of which is secured to the flange 19 by nut-equipped bolts 21 having their heads counter-sunk in said jaw. The jaws 20 are connected, for opening and closing movements, by a pair of nut-equipped bolts 22 located slightly below the longitudinal centers of saidjaws. An eccentric 23 is provided for clamping the jaws on the scraper-blade 21. This eccentric 23 is pivoted to a pair of lugs 25'on the upper longitudinal edge of the outer jaw 2O and bears against the adjacent portion of the inner jaw 20. Integrally formed with the eccentric 23 is a hand-piece 26, by which said eccentric is oscillated. interposed between the upper longitudinal edge of the inner jaw 20 and the supplemental frame 17, is a resilient spacing block 27.

The supplemental frame 17 is detachably and reversibly securedlto the main frame 1 by a nut-equipped bolt 28, passed through alined perforations in said frames, and a depending stud 29 rigidly secured to said supplemental frame and extending through a perforation in the main frame. Obviously, by removing the nut of the bolt 28, the supplemental frame 17, and parts carried thereby, may be lifted bodily from the main frame and turned from the position shown in Fig. l to the position shown in Fig. 3, or vice versa.

Resilient spacing blocks 30 are interposed between the main and supplemental frames, and are secured in position by the i plemental frame 17.

blocks on the bolt 28 yieldingly support the supplemental frame y17 vin an intermediate bolt esfana ma '29.` A sea'cingbiockei, also of resilient material, is interposedbetween the head lof ltite'lbiolit-lflanelthe sup The two spacing iThesespucingblocks 27, 30 and 31`take up slight vibrationsin .the scraper blade24, and prevent trembling ofthe same, thereby increasingothe 'elieiency ofthe de- `vice. Freier-ably, it 'is desirablel te push `theI scraper-blade 24 over the work, and,4 in'so doing, morel or less` downward pressure may be appliedto the scraper-blade, tot hold the i same to its work. Figs.r Qand 3 ghowrthe devicei adjusted `for pushing the scraperpblade" over the work. In'someAinstances', however, it is necessaryxtofpull the scraper- `blade Vovery the work, ,1n 'which case a` removable weight 32"y placed; on ythe vsupplenit-intal`r frame 17, betweentheflangesulS, to add the necessaryfweight to hold said scraperiblade to itswbrk, Fig. 1 showsthep dev'ice with thescraper-blade adjusted to be pulledI over the work. y n v `The yabove described ydev icehas, in actual usage, proven highly efficient forthe `pur- `30f pose had v1n View; l

1. vInj a` floor Scraper, the. combinaignwith V afwh'eel-supported main; frame, of a suplpliax'nental frame resiliently supportedv on rthe vmain frame at its transverse center and t havingfits ends out of contact therewith, a

e scraperblade clamp carried by the supple- 'H mental frame, and means forpropelling thev scraper,

j 2.1m 116er' scraper, the embmationwah axially alined trunnions on its yside members, and wheels `j'oisi-rn@ied on said trunnions, Yof a supplemental frame resiliently supported on the main frame at yits trans- Verse center and havingits ends out of con- 45 tacttherewith, a scraper blade cliainpfcan ried by the supplemental frame, and means iforf propelling` the""scraper.

3. In a 'loor scraper, the combination with;

`a wheel-supported frameihaving aj down- 50 vardly4 and outwardlyprojecting flange, ef`

a scrzmer blade cla-mphaving its lower portion bearing" on thelower edge portionY of said flange, a resilientdevice interposed` between the, upper edge portion of said` 55 having its ends out'ofcontacttherewith, p

said supplemental frame having a down-= wardly Vand outwardly projecting flange a1 65 scraper blade clampliaving its.l lower edge portion Abearing on the lower edge porti i, of saidilange, a resilient deyice interp A L between the upper edge portions of said flange and clamp and located intermediately o of the ends thereof, and fmeans for propelling the scraper. y f Y In 'testimony'whereof I aflix my'signature in presence of two witnesses. i o

. o LEWIS P. THOMPSON. Witnesses:` o l vALICE L. KING, 4 Hanny D.'Kn.eonn.

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